Machine for making sheet insulation.



K. BASSLER.

MACHINE FOR MAKING SHEET INSULATION.

'lPLIOATION FILED JULY 31, 1909.

1,040,995. Patented Oct. 15, 1912.

2 I I I i q I I l a am a I l I 2 1 IAYITNESSES: JNYL ZTUH URT ASSLEH.//77 @00 7 6 4 QM a W UNITED STATES PATENT OFFICE.

KURT BASSLER, OF BERLIN, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY,A CORPORATION OF NEW YORK.

MACHINE FOR MAKING SHEET INSULATION.

Specification of Letters Patent.

Patented Oct. 15, 1912.

To all'who'm it may concemi Be it known that I, KURT BAssLnn, a subjectofthe King of Saxony, residing at Berlin, Germany, have invented certainnew and useful Improvements in Machines for Making .Sheet Insulation, ofwhich the following is a specification.

This invention relates to means for producing sheet insulation forelectrical and other uses and has for its object the provision of amachine for making insulation of this character which will readily adaptitself to a variety of uses and which may be produced at a very lowcost.

One of the objects of my invention is the production of sheet insulationmade from small pieces or fragments of insulating material suchas micaor the like mounted upon a flexible fibrous base. In. carrying out myinvention, I employ pneumatic means for drawing the mica fragments ontothe foundation sheet. The arrangement is such that a continuous currentof air is drawn through a movable net work or wire screen, which is soarranged that only a portion of the net work is subjected to the actionof the current of air. The fragments are drawn upon the screen and thenpressed upon a traveling roller upon which the foundation sheet ismounted. An adhesive material is then applied which holds the fragmentsin place and the sheet may then continue to travel and receivesuccessive layers of the fragments.

In the accompanying drawing is shown, in a somewhat diagrammatic way, ama chine for carrying out my invention.

Referring to the drawing, the machine consists mainly of a largerotating drum A and a smaller drum B over which runs an endless belt orsheet C of fibrous material, such as cloth or paper. This belt may beformed in any desired manner, as, for .instance, by securing the ends ofthe fibrous sheet together by adhesive. This sheet is utilized as afoundation sheet.

D is a box of substantially the same width as the drum and havinglocated at its lower end a perforated drum E. This drum may be of sheetmetal, if desired. The perforations may be of any suitable size,dependent upon the size of the fragments to be used, and otherconditions. This box D is opened on the side toward the drum as shown,and the air is exhausted from the box by means of a pipe M.

F is an endless wire screen or perforated belt which is led over therollers G, H and I, as well as over the perforated cylinder E. This wirescreen also passes through the box D and rests at its upper end upon thedrum A.

K represents a belt or conveyer, by which the small mica fragments arecarried to the perforated cylinder.

L is a spraying device for spraying adhesive, such as shellac, on thesheet C. The endless cords or wires N are arranged on a pulley so as toengage a portion of the sheet C to hold the mica fragments in place.

The mode of operation is as follows: The mica fragments are placed uponthe conveyer K in any desired manner and fed to the perforated belt orroller E, a vacuum being maintained Within the box D. As the micafragments reach the perforated belt they. are drawn upward so as tocover the perforations and a layer of mica fragments is thereby spreadover the belt. These fragments adhere to the perforated belt and arethen pressed against the sheet C, which is being rotated at the samespeed as the perforated belt. When the fragments leave the box D thereis no longer any pressure maintained upon the fragments from the vacuum.They are held on by the pressure between the two belts until they reachthe upper portion, where they are sprayed with adhesive material by thespraying device L. The sheet continues around the roller 13 and thefragments are held on by the wires N. This rotation may be continued andsuccessive layers applied. The sheet may then be cut from the rolls and,if desired, the mica separated from the foundation sheet.

While I have described my invention as embodied in concrete form and asoperating in a specific manner, for purposes of illustration, it shouldbe understood that I do not limit my invention thereto, since variousmodifications thereof will suggest themselves to those skilled in theart without departing from the spirit of my invention, the scope ofwhich is set forth in the-annexed claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is,--

1. A machine for making sheet insulation comprising a movable screen,means for producing a vacuum on one side of said screen,

a device for feeding mica fragments or the like to' the screen to beheld thereby, and a movable support upon which the fragments are pressedby the screens 2. A machine for making sheet insulation comprising aperforated endless belt, means for producing a vacuum within said belt,a device for feeding mica fragments or the like to the belt to be heldthereby, and a support movable with said belt for receiving the micafragments from the belt. 3

3. A machine for making sheet insulation comprising a perforated endlessbelt, a perforated supporting roller therefor, means for producing avacuum within said belt and roller, a device for feeding mica fragmentsor the like to be held by the belt and an endless support movable withsaid belt 0;- receiving the mica fragments from the e t. 4:. A machinefor making sheet insulation comprising a perforated endless belt, meansfor producing a vacuum in a portion of the space within said belt, adevice for feeding mica fragments or the like to the belt to be heldthereby throughout the evacuated por-' tion and a support engaging thebelt beyond the evacuated portion to receive the mica fragmentstherefrom.

5. A machine for making sheet insulation comprising a perforated endlessbelt, meansfor producing a vacuum in a portion of the space within saidbelt, a device for feeding mica fragments or the like to the belt to beheld thereby throughout the evacuated portion, a support engaging thebelt beyond the evacuated portion to receive the mica fragmentstherefrom and means for applying adhesive to the fragments on thesupport.

6. machine for making sheet insulation comprismg a perforated endlessbelt, means for producing a vacuum in the portion of the space withinsaid belt, a device for feedmica fragments or the like to the belt H1 tobe held thereby throughout the evacuated porting roller and means forapplying adhesive material to the fragments after leaving the belt.

: 8. A machine for making sheet insulation comprising a perforatedendless belt, a perforated supporting roller therefor, means forproducing a vacuum within said belt and roller, an imperforatesupporting roller arranged to be engaged by the perforated beltthroughout a portion of its surface, means for feeding mica fragments'orthe like to the belt to be held thereby and pressed ontoi theimperforate roller, and means for applying adhesive material to thefragments after leavingthe belt.

9. A machine for making sheet insulation comprising a pair of rollersmounted in parallel relation for receiving a flexible sheet, aperforated endless belt engaging one of said rollers throughout aportion of its surface, means for producing a vacuum within a portion ofthe space within the belt, means for feeding mica fragments or the liketo the belt to be held thereby and pressed onto the roller, and meansfor applying ad hesive material to the fragments after leaving the belt.

In Witness whereof, I have hereunto set my hand this 19th day of Lily,1909.

KURT BASSLER.

, Witnesses:

TY EMILIO FoRnELLI, GUILIsoN MARIO.

